Nature of Science

What step does every scientific experiment begin with?

• hypothesis

• question/problem

• Dependent Variable

• conclusion

The independent variable is the ONE thing you _____.

• change on purpose
• control or keep constant
• measure

Tags

NGSS.MS-PS3-4

NGSS.MS-PS2-2

The variable that is being measured or observed is called the _______________. Hint: It's the Data or the variable that is the result/effect

• Independent Variable

• Dependent Variable

• Constant

Tags

NGSS.MS-PS3-4

Why do we want to test one variable at a time?

• Because it is hard to setup a data table with more
• To know what is causing the changes. This helps us understand cause and effect.
• It is what has always been done

What is a constant in an experiment?

• Things that do not change. It's the things that stay the same. You can have many things stay the same.

• It's the variables that the scientist changes in the experiment

• It's the variables that are being measured in an experiment

What is the Independent Variable (What is being changed) in this experiment?

• ramp height

• the speed that the ball rolls

• type of ball

What is being kept constant?

• ramp height
• speed of the ball rolling
• type of ball

Tags

NGSS.3-5-ETS1-3

Jackie sets up an investigation to find out how many paperclips she can pick up with an electromagnet.

Jackie touches the magnet to a pile of 100 paperclips and picks up 15 of them. Jackie concludes that her electromagnet can pick up 15 paperclips. What should Jackie do to improve her investigation?

• Jackie should use a regular magnet and not an electromagnet.

• Jackie should use a different type of battery.

• Jackie should do more trials to make sure her results are valid.

• Jackie should begin with more than 100 paperclips.

Tags

NGSS.MS-PS2-5

Billy's class is studying the Moon. He is curious about how craters are formed. His teacher has the class do an investigation to find out if rocks dropped from different heights will make craters that are different in depth.

The class decides to drop a rock from 50 centimeters, 1 meter, and 1.5 meters. What do we call each of the three different heights that the rock is being dropped from?

• control

• graph

• hypothesis

• independent variable

Billy's class is studying the Moon. He is curious about how craters are formed. His teacher has the class do an investigation to find out if rocks dropped from different heights will make craters that are different in depth.

The class decides to drop a rock from 50 centimeters, 1 meter, and 1.5 meters. Select each thing that should be a constant (stay the same).

• Hight the rock dropped from

• The size of the rock

• The material that the rock is dropped into (sand, dirt, etc)

• The way the rock is dropped

Tags

NGSS.MS-ETS1-1